Sun Microsystems StorEdge 3000 Series, Руководство по лучшим практикам

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Chapter 3 Planning Your Storage Architecture 19
The actual number of servers that can be connected varies according to the number
of controllers in the array. It also depends on the number of Fibre Channel
connections used for each server and the total number of small form-factor
pluggable (SFP) interface modules installed. DAS configurations often include single
or dual servers only, though a dual-controller array can support up to:
■
Four servers with redundant connections for Sun StorEdge 3510 FC arrays, or
eight servers in non-redundant DAS configurations.
■
Six servers with redundant connections for Sun StorEdge 3511 SATA arrays, or 12
servers in non-redundant DAS configurations.
Note – Do not use a Sun StorEdge 3511 SATA array to store single instances of data.
It is more suitable for use in configurations where the array has a backup or archival
role.
Additional SFP modules are required to support more than two servers with
redundant connections or four servers in non-redundant configurations. For
information about obtaining and relocating SFP modules, refer to the
Sun StorEdge
3000 Family Installation, Operation, and Service Manual for the Sun StorEdge 3510 FC
Array and Sun StorEdge 3511 SATA Array.
Note – Except in some clustering configurations, in a DAS loop configuration when
you connect two hosts to channel 0 (both FC 0 ports of either controller), or channel
1 (both FC 1 ports of either controller) on a Sun StorEdge 3511 SATA array, you must
use host filtering if you want to control host access to storage. Refer to the user
documentation for your clustering software to determine whether the clustering
software can manage host access in this configuration.
Storage Area Networking
Combining storage switches with a Sun StorEdge 3000 series array configuration
creates a SAN, increasing the number of servers that can be connected. Essentially,
the maximum number of servers that can be connected to the SAN becomes equal to
the number of available storage switch ports. Storage switches generally include the
ability to manage and monitor the Fibre Channel networks they create, which can
reduce storage management workloads in multiple server environments.